Fifty bucks

A mother tells her son to go into town to sell their duck for food money, the boy does as she says and goes into the town square. There he meets a young lady on the street corner who tells him "I have a few uses for a duck but I don't have any money, what do you say we go inside and roll in the hay for a trade?" The boy agrees and they go inside to have sex. Afterwards the lady says to the boy "You were pretty good, if you can do it again I'll give you your duck back" the boy once again agrees and they go back inside. After their second time they go back outside and the lady gives the boy his duck back, but as she hands it over it flies out of her hand and into traffic where a car hits it. The driver runs out and over to the boy apologizing profusely and offers the boy $50 for the loss of his duck. The boy goes back home and his mother asks him how he did, the boy says "Well I got a fuck for a duck, a duck for a fuck, and fifty bucks for a fucked up duck."